Oxidation behavior of N-hydroxyphthalimide (NHPI) and its electrocatalytic ability toward benzyl alcohol: Proton acceptor effect

Synthesis of Cu(II) complexes by N,O‐donor ligand transformation and their catalytic role in visible‐light‐driven alcohol oxidation

“…As oxidation of alcohol to aldehyde and carboxylic acid is a very important reaction in organic as well as biochemistry, many catalytic systems have been developed with different reaction conditions and yields. [ 31–61 ] Despite several reports, the existing methodologies are often plagued by disadvantages like harsh reaction conditions, use of toxic metals, and poor recyclability. Photocatalysis emerged as an important tool to carry out such reaction in a more environmentally friendly condition without application of external heat.…”

“…Alcohol oxidation by copper catalyst is a well-known process and extensively studied as reported in literature. [31][32][33][34][35][36][37][38][39] The oxidation process has been explored in various methodologies including traditional heating, [40][41][42][43][44] microwave irradiation, [39,[45][46][47] electrochemical method, [48][49][50][51][52] and ultrasonic irradiation. [53][54][55] Interestingly, though alcohol oxidation is reported by photocatalytic systems like Ag 2 S-CdS junction [56][57][58] and platinum nanocluster/graphitic carbon nitride, [59,60] however, use of copper complexes as photocatalyst remains rare and largely unexplored.…”

Recent progress and perspectives of liquid organic hydrogen carrier electrochemistry for energy applications

“…1j). 33 The introduction of water induces a negative shift in redox potentials, suggesting hydrogen-bonding interactions and a concerted electron-proton transfer mechanism. TEMPO exhibits an electrochemical redox to corresponding hydroxylamine (TEMPOH) at −0.38 V vs. NHE, displaying a pronounced pH dependence under acidic conditions.…”

“…Aminoxyl species, like 2,2,6,6-tetramethylpiperidine N-oxyl (TEMPO) and phthalimide N-oxyl (PINO), represent a unique class of potential LOHCs with interesting electro-redox behavior facilitated by protons 22 . N-hydroxyphthalimide (NHPI) exhibits reversible oxidation/reduction peaks in an aprotic acetonitrile electrolyte, generating PINO at 1.5 V that can be reduced back to NHPI at 1.3 V vs Ag/AgCl (Figure 1j) 33 . The introduction of water induces a negative shift in redox potentials, suggesting hydrogen-bonding interactions and a concerted electronproton transfer mechanism.…”

Solar-driven H2O2productionviacooperative auto- and photocatalytic oxidation in fine-tuned reaction media

“…5b). 40,41 The photocatalytic contribution of BzOH oxidation to H 2 O 2 formation was studied using deuterated BzOH-d 7 (Fig. 5e).…”